C++ By using a function and only use #include (other library and ANY LOOP(for, while) are not allowed) , please use recursion to write the code. input any math formula in string, the input and return result should be like this below: Case 1 input: "1+1-2+1334" return: "1334" Case 2 input "16+41-53+8768" return: "8772" Case 3 input "5563-4326+3-8+45" return: "1277" Case 4 input "4+3" return: "7" given function: int calculate(const char str[]) You can add more function to help if needed.(ANY LOOP(for, while) are also not allowed)

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Declaring and Defining the function

A set of statements, which performs a particular task is called a function. The program gains modularity by using function. The application is quite easy to understand, read, and edit when they are created with functions. The developer/programmer creates a function and uses main() to call the function. Once the function gets executed, the control is transferred to the main program.